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  • Python 压缩图片至指定大小

     1 import base64
     2 import io
     3 import os
     4 from PIL import Image
     5 from PIL import ImageFile
     6 
     7 
     8 # 压缩图片文件
     9 def compress_image(outfile, mb=600, quality=85, k=0.9):
    10     """不改变图片尺寸压缩到指定大小
    11     :param outfile: 压缩文件保存地址
    12     :param mb: 压缩目标,KB
    13     :param step: 每次调整的压缩比率
    14     :param quality: 初始压缩比率
    15     :return: 压缩文件地址,压缩文件大小
    16     """
    17 
    18     o_size = os.path.getsize(outfile) // 1024
    19     print(o_size, mb)
    20     if o_size <= mb:
    21         return outfile
    22 
    23     ImageFile.LOAD_TRUNCATED_IMAGES = True
    24     while o_size > mb:
    25         im = Image.open(outfile)
    26         x, y = im.size
    27         out = im.resize((int(x * k), int(y * k)), Image.ANTIALIAS)
    28         try:
    29             out.save(outfile, quality=quality)
    30         except Exception as e:
    31             print(e)
    32             break
    33         o_size = os.path.getsize(outfile) // 1024
    34     return outfile
    35 
    36 
    37 # 压缩base64的图片
    38 def compress_image_bs4(b64, mb=190, k=0.9):
    39     """不改变图片尺寸压缩到指定大小
    40     :param outfile: 压缩文件保存地址
    41     :param mb: 压缩目标,KB
    42     :param step: 每次调整的压缩比率
    43     :param quality: 初始压缩比率
    44     :return: 压缩文件地址,压缩文件大小
    45     """
    46     f = base64.b64decode(b64)
    47     with io.BytesIO(f) as im:
    48         o_size = len(im.getvalue()) // 1024
    49         if o_size <= mb:
    50             return b64
    51         im_out = im
    52         while o_size > mb:
    53             img = Image.open(im_out)
    54             x, y = img.size
    55             out = img.resize((int(x * k), int(y * k)), Image.ANTIALIAS)
    56             im_out.close()
    57             im_out = io.BytesIO()
    58             out.save(im_out, 'jpeg')
    59             o_size = len(im_out.getvalue()) // 1024
    60         b64 = base64.b64encode(im_out.getvalue())
    61         im_out.close()
    62         return str(b64, encoding='utf8')
    63 
    64 
    65 if __name__ == "__main__":
    66     for img in os.listdir('./out_img'):
    67         compress_image(outfile='./out_img/' + str(img)[0:-4] + '.png')
    68     print('')
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  • 原文地址:https://www.cnblogs.com/jum-bolg/p/13796595.html
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